force on solids

Which of the lists below is NOT an example of elastic bodies?

• Rubber band

• Balloon

• Metal spring

• Steel wire

Which of the statement below best describe elasticity?

• Returns to its original shape after the distorting force is removed. 

• Won't go back to its original shape after the force is removed

• Nothing happen even when force is applied

• Retain its shape once its is distorted

Hooke's Law states that _______________________

Which equation represent Hooke's Law?

• F = m e

• Weight = Mass x gravitational acceleration

• Extension = New length - original length

• F = k e

What happen when elastic point is achieved?

• A spring will not go back to its original length and left with permanent extension

• A spring will not go back to its original length and it will break

• A spring will go back to its original length and no permanent extension

• A spring will go back to its original length and smaller in size

Which point represent the elastic limit?

• A

• B

• C

• D

Which point shows that the material is obeying Hooke's Law?

• A

• C

• D

• F

Which statement correctly define plastic behaviour?

• When force is applied and exceeds it elastic limit and the object stays deformed after the force is removed

• the materials will go back to its original shape even after the force is removed

• The materials exceeds its elastic limit but the shape will go back to its original shape once the force is removed

• The object obey the Hooke's Law and stays deformed when the force is removed

Elastic stiffness is the rigidity of the object, hence it [allows / resists] deformation when force is applied

Stiffness is the ratio of force and the ____________